it's just a guitar with 4 big thick strings and an elongated neck that you play with your fingers instead of a pick(though some people actually do play with a pick)

It's basically rhythm guitar without having to play chords

Once again, not really; Rhythm guitar plays off of the drums and the bass; the bass guitarist has to keep the beat and ontop of that does do some of their own, more 'lead-ish' flairs and trists in playing.

Try playing 'Rock You Like A Hurricane' by The Scorpions. That has a really nice bass line [the chorus anyway], and it's dead easy. it's the first song I learned to play and memorised. You should try it too.

Bass you will definitely need to know chords, not necessarily be able to play them. Knowing chords and keys etc. is very useful for bass playing, so I recommend lots of theory, unless you just want to play tabs which is boring.

For a long time i tried, and failed to play electric guitar. I never really enjoyed playing anything on it, it seemed like dull, sounded high and annoying. Anyway, my uncle recently showed me his bass guitar, and i've started listening to some cool Bass music, and i think I originally tried to learn the wrong instrument, i think i'm a bassist!

I'm looking to pick up a bass guitar, preferably on the cheaper scale and was thinking of this one...

Let me begin by pointing out no instrument is harder to learn than another, technically or conceptually, the instrument, and thereby the music is as hard as you want it to be.

Secondly my suggestion is play no band in particular.
Play whatever band you like listening to, chances are you'll enjoy playing their music just as much as you, if not more than, you enjoy listening to it.

For good lessons though, short of hiring an actual teacher, I would suggest Bass Player magazine/website, they have great lessons for both beginners and experts.
Also they approach the music from a purely bassist standpoint, while Guitar Player or Guitar World would mention it as merely a footnote.

One last thing, play not only WHAT you wish to play but also HOW you wish to play.
Don't feel you need to play finger style, there are plenty of great bassists that use picks: Lemmy - Motorhead, Justin Chancellor - Tool, and a plethora of others.

The greatest bassists, and musicians in general, are not defined by what or how they play, but how well they do it.

I play bass, and I have a few pointers:
1. Build up callouses on your fingertips. It helps tons.
2. Build up your finger strength, especially in the pinky on your fretting hand.
3. Don't try the Myung Tackle. You will not succeed.